PT - JOURNAL ARTICLE AU - Kreel, L TI - Radiology of the portal system. AID - 10.1136/gut.11.7.620 DP - 1970 Jul 01 TA - Gut PG - 620--626 VI - 11 IP - 7 4099 - http://gut.bmj.com/content/11/7/620.short 4100 - http://gut.bmj.com/content/11/7/620.full SO - Gut1970 Jul 01; 11